Jetty



June 1, 1937. L, MAHON 2,082,707

JETTY Filed July 5, 1954 INVENTOR. LLO YD L M/moN ATTORNEY.

Patented June 1, 1937 uairsn stares smear or ies JETTY Lloyd L. Mahon, Wichita Falls, Tex.-. Application. July 5, 1934, Serial ,No. 733,752

1 Claim.

My invention relates to improvements in a jetty.

The object of my invention is to design a specific style and shape .of a permeable jetty unit that when assembled of standard materials with all connections and fastenings rigidly engaged, the unit is capable of functioning efliciently when in any position .by having regulated .permeability and equalized strength of structure when it is assembled in any desired size.

A further object of my invention. is to construct a permeable jetty unit that will function eflicient'ly when it is in any position with regulated permeability requiring a minimum of material and gaining an ultimate strength of structure necessary to withstand the avulsions and impacts that the unit is subject to in' any stream at their various stages.

A still further object of my invention is to embody the greatestpossible area of structure with regulated permeability requiring a minimum of material.

A still further object of my invention is to provide a collapsible frame and means to secure the same in operative position prior to threading the cables in the apertures of the frame or inserting rods or other strands.

A still further object of my invention is to provide a jetty composed of triangles connecting the same in such a way that the apex of the triangles will circumscribe a spherical body and having internal ties connecting each apex diametrically.

These and other objects will hereinafter be more fully explained, reference being had to the accompanying drawing forming a part of this specification, and in which like characters will apply to like parts in the different views.

Referring to the drawing:

Figure 1 is a view transverse to a pair of oppositely disposed triangles of the structure.

Figure 2 is a side view transverse to the vertical axis of Figure 1.

Figure 3 is an axial View thru an intersection of the upper and lower triangles.

Figure 4 is a similar view to Figure l reversing the structural material with respect to frames and strut members.

Figure 5 is a similar view to Figure 2.

Figure 6 is the frame of Figures 4 and 5 collapsed.

Figure 7 is an end view of Figure 6 illustrating a method of attacking or nesting of collapsed frames.

Figures 8 and 9 are diagrammatical views of a (Cl. GI -3) stream .and position of .jetties differently arranged; t

Figure lilisanenlarged view of the cehterportion ofthe frameconstruction. of Figures 4 and 5 indicating the direction of rock when collaps- 5 ing or unfolding theframe.

My invention herein disclosed consists of "a permeable .jetty comprising .a plurality of tr'iangles i constructedof any desirable structural steel such as rectangular fL. members, channels or round bars, .prefe1-ablyjL shapes are employed by, the manufacturers in the construction. thereof, and'th'e same being braced or tied together by cables or rods2, the latter pass-. ing diametricallythroughthe structure and having each end secured to the apex of their respective triangles as at iA and BB ,and C C." Said rods closely engaging in the center of the structure "as at D, at'which point. they extend transverse to each other. The said rods maybe substituted by rnetallic cables as the structure is largely self supporting through the medium of the triangular forms, but the said rods or cables intermediately positioned are required as silt collecting elements working in con- 2 junction with the external triangular frames.

It will be understood that when a plurality of jetties are placed in series within a stream as diverting means for the current, the said jetties are tied together with a cable in spaced relation to each other as shown in Figures 8 and 9, the method of attaching the cables is optional to the installator, that is to say the cable may be clamped to the externally arranged frame or at the intersection of the framework centrally crossing the structure.

In Figures 4 and 5 is shown a framework composed of angles 3 pivotally connected intermediate of their ends and arranged to collapse to parallelism as shown in Figures 6 and 7, the principle of which is later described, each member of said frames has a plurality of apertures 4 spaced therealong as means through which to insert rods or cables 5, S, and i, each engaging corresponding apertures in the different frame 45 members with respect to the center pivoting points, by which means the said frame mem bers are firmly supported against collapsing and to withstand the avulsions and impacts the unit is subjected to in streams at various stages.

Attention is also directed that by such arrangement, the framework may be minimized with respect to cross section as it is braced equally at short intervals with respect to the frame members longitudinally. It is further directed that the structures shown in Figures 1 and 4 are practically the same with respect to contour and will function similar when installed in series.

A further advantage in the manufacture and shipment of a jetty made under the design shown in Figure 4 is the collapsible frame and possibility of nesting the same in bundles as shown by dotted lines E in Figure '7. To accomplish such arrangement, I now call attention to Figure 10, which is an enlarged view of the central portion of said frame members 3, and will refer to each by letters F, G, and H.

Frame members F and G are pivoted together at the longitudinal center of each by a bolt or rivet 8 engaging through apertures arranged therefor in the legs of the said members. The frames may rock in either direction to parallelism as indicated by the arrows, while frame member H will rock to frame member G by rivet 9 when the near end as shown in the view is rocked in the direction of its respective arrow, it will place the same in parallelism with the said leg member G. To equalize the ends of all of the frames, the apertures must be offset in accordance with the diagonal position of the rocking points as shown in Figures 6 and 10.

It will be understood that the rocking movement of leg H, is done prior to the insertion of rivet H) which is the stabilizing means for the transverse position of all of the legs preparatory to threading the said rods or cables.

It is now clearly shown the method of collapsing and packing the component frame parts of each individual jetty and the possibility of nesting the same for storage or shipment and the brace lengths may be bundled in separate packages at the discretion of the manufacturer or shipping clerk.

In assembling, the members of the unit of jettection for the future.

ties are equalized to effect the required permeability, area, and strength of structure for the location to be served. The unit is to be used in a series with other units securely fastened one to another and to the bank of a stream in doing stream control work. The series of units are flexible to conform to any irregularities along the bank or in the bed of the stream, the purpose of which is to divert the stream current causing the accumulation of silt in and about the jetty units until the same has become submerged or practically so and will act as a permanent pro- I also find the installation of the jetties across a stream bed to assist the change of the channel which is often arranged by a minor dredge that is later perfected by the current changing therethrough very beneficial,

and while I have shown strands continuously extending through the apertures, the same may be severed at the point of intersection with the frame, and tied by looping and clamping an end portion back on itself, or other means of attachment, and such other adaptations for the jetty may be exercised, and such modifications may be employed with respect to the structure as lie within the scope of the appended claim, and having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

A jetty of the character described comprising a plurality of rectangular metallic frames interengaging with each other so that their diametrically opposite corners engage, the frames lying at different inclination with respect to each other with the extremities of the several frames lying within a common sphere, tie braces passing between the diametrically opposite corners of the frames, the said braces also serving to rigidly secure the corners of the frames together.

LLOYD L. MAHON.\ 

